KR20120112190A - Fluorescent display, and driving circuit and driving method thereof - Google Patents

Abstract

PURPOSE: A fluorescent display tube and a circuit and method for driving the same are provided to reduce the unevenness of a dark line generated on both ends of a selected pixel by emitting light according to a display signal. CONSTITUTION: A grid electrode(G1) is a first grid electrode to be ON. A grid electrode(G2) is a second grid electrode to be ON. A first frame is composed of an anode segment C, an anode segment D, an anode segment E, and an anode F. A selected pixel emits light. A second frame is composed of an anode segment B, an anode segment C, an anode segment D, and an anode E. A third frame is composed of an anode segment D, an anode segment E, an anode segment F, and an anode G.

Description

Fluorescent display tube, driving circuit and driving method of fluorescent display tube {FLUORESCENT DISPLAY, AND DRIVING CIRCUIT AND DRIVING METHOD THEREOF}

The present invention relates to a fluorescent display tube, a driving circuit of the fluorescent display tube, and a driving method of the fluorescent display tube.

As a technology related to a fluorescent display tube, a fluorescent display tube (VFD) suitable for a multi-matrix driving method, a multi-matrix driving method for driving such a fluorescent display tube, and moreover, a driver embedded therein in a fluorescent display tube Fluorescent display tube (CIGVFD) is known as a background art (patent document 1, patent document 2, nonpatent literature 1). In the multi-matrix driving method of the background art, the duty factor can be improved as compared with the single matrix method, and display quality (display quality) can be obtained better than that of the single matrix method.

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2000-306532

[Patent Document 2] Japanese Patent Laid-Open No. 2003-228334

[Non-Patent Documents]

[Non-Patent Document 1] Kishino Takao, "Fluorescent Display Tube" Industrial Books Co., Ltd., Pyeongseong 2, October 31, 1990, p. 170-183 and p. 226-248

According to the technique of the multi-matrix drive system shown in the background art, a display with better display quality can be obtained than the single matrix system, but there is a demand for better display quality. This invention solves such a subject and provides the technique which can obtain the display quality more favorable compared with the past.

The fluorescent display tube of the present invention is divided for every eight or more positive integers M represented by powers of two, and the anode segments having the same position in the array in the same position are connected in the column direction to form M anode lead-out lines. An anode segment row formed therein and a grid electrode extending in a row direction orthogonal to the anode segment row and having a grid lead line, wherein the plurality of anode segment rows and the columns of the plurality of grid electrodes are formed in a matrix form. In the M heavy-anode matrix fluorescent lamp tube arranged so as to oppose M / 2 anode segments in each of the grid electrodes and each of the anode segment rows, the adjacent first grid electrode and the second grid are provided. 1st among M anode segments which can be light-emitted by turning on an electrode, The said 1st (M / 4) anode segments disposed sequentially from the position closest to the lead electrode and opposing the second grid electrode, and disposed sequentially from the position nearest the second grid electrode and opposing the first grid electrode ( A selection pixel in which M / 4 anode segments are selected and formed, (M / 4-J) anode segments disposed sequentially from the position closest to the first grid electrode and opposing the second grid electrode; The value of J is selected to vary from 1 to 2 ^(K-3) so as to have (M / 4 + J) anode segments disposed in order from the position closest to the second grid electrode and opposite the first grid electrode. (M / 4 + J) anods arranged in order from one or a plurality of selected pixels to be formed and from the position closest to the first grid electrode and facing the second grid electrode Segment and the second from a position closest to the grid electrode which is arranged in order opposite to the first grid electrode so as to have a (M / 4-J) of the anode segments, J (constant) 2 ^(K- values from one of the ^And a driving circuit which emits light according to a display signal of one selected pixel among one or a plurality of selected pixels which are selected and formed by changing up to ³⁾ .

The driving circuit of the fluorescent display tube of the present invention is divided for every 8 or more positive integers M represented by powers of powers of 2, and M anodes are connected by connecting anode segments having the same position in the column in the column position. An anode segment row formed with a leader line, and a grid electrode extending in a row direction orthogonal to the anode segment row and having a grid leader line, the plurality of anode segment rows and a plurality of columns of the grid electrodes A driving circuit of a fluorescent display tube which is arranged in a matrix and drives an M-matrices fluorescent display tube formed by opposing M / 2 anode segments in each of the grid electrodes and each of the anode segment rows. The light emission is made possible by turning on the first grid electrode and the second grid electrode. (M / 4) anode segments disposed sequentially from the position closest to the first grid electrode and facing the second grid electrode, and sequentially disposed from the position closest to the second grid electrode among the M anode segments (M / 4) anode pixels facing the first grid electrode are selected and formed, and (M / 4) disposed sequentially from the position closest to the first grid electrode and facing the second grid electrode. The value of J is set from 1 to 2 ⁽ -J) to have anode segments and (M / 4 + J) anode segments disposed in order from the position closest to the second grid electrode and facing the first grid electrode. ^K-3) to be changed by one or a plurality of selected pixels, wherein the formed selection is arranged in order from a position closest to the first grid electrode (M / 4 + J) anode segments facing the two grid electrodes, and (M / 4-J) anode segments disposed in order from the position closest to the second grid electrode and opposite the first grid electrode. One selected pixel among one or a plurality of selected pixels formed by changing the value of J (integer) from 1 to 2 ^(K-3) is made to emit light according to the display signal.

In the method of driving the fluorescent display tube of the present invention, M anodes are formed by connecting anode segments having eight or more positive integers represented by powers of powers of two, which are arranged in the division, in the column direction. An anode segment row formed with a leader line, and a grid electrode extending in a row direction orthogonal to the anode segment row and having a grid leader line, the plurality of anode segment rows and a plurality of columns of the grid electrodes A method of driving a fluorescent display tube which is arranged in a matrix and drives an M matrix anode fluorescent lamp formed by opposing M / 2 anode segments in each of the grid electrodes and each of the anode segment rows. The light emission is made possible by turning on the first grid electrode and the second grid electrode. (M / 4) anode segments disposed sequentially from the position closest to the first grid electrode and facing the second grid electrode, and sequentially disposed from the position closest to the second grid electrode among the M anode segments (M / 4) anode pixels facing the first grid electrode are selected and formed, and (M / 4) disposed sequentially from the position closest to the first grid electrode and facing the second grid electrode. The value of J is set from 1 to 2 ⁽ -J) to have anode segments and (M / 4 + J) anode segments disposed in order from the position closest to the second grid electrode and facing the first grid electrode. ^K-3) one or more selected pixels which are selected and formed by changing up to ^K-3) , and are sequentially arranged from a position closest to the first grid electrode and (M / 4 + J) anode segments facing the second grid electrode, and (M / 4-J) anode segments disposed in order from the position closest to the second grid electrode and opposite the first grid electrode. The value of J (integer) is changed from 1 to 2 ^(K-3) so that one selected pixel of one or a plurality of selected pixels formed and selected is made to emit light according to the display signal.

Another fluorescent display tube of the present invention is an anode segment row formed with Q anode lead-lines by dividing the anode segments having an array of positions equal to 8 or more even integers of 8 or more and having the same position in the segment in the column direction. And a grid electrode extending in a row direction orthogonal to the anode segment row and having a grid leader line, wherein the plurality of anode segment rows and the plurality of columns of the grid electrodes are arranged in a matrix, and each grid In a Q-type anode matrix type fluorescent display tube formed by opposing Ｑ / 2 anode segments in each of the anode segment rows, light emission is possible by turning on adjacent first and second grid electrodes. Among the four anode segments, the first grid electrode is the most R anode segments, which are arranged in order from abutting position and which are any number in the range of 1 to (Q / 2-1) facing the second grid electrode, and are sequentially arranged from the position closest to the second grid electrode. And a driving circuit which emits, according to a display signal, one selected pixel of a plurality of selected pixels formed by selecting a total of Q / 2 anode segments of (Ｑ / 2-R) anode segments facing the first grid electrode. It is provided.

The driving circuit of another fluorescent display tube of the present invention is formed for each of the even-numbered positive integers Q of 8 or more, and is formed with the Q anode lead lines by connecting the anode segments having the same position in the column in the column direction. An anode segment row and a grid electrode extending in a row direction orthogonal to the anode segment row and having a grid lead line, the plurality of the anode segment row and the columns of the plurality of grid electrodes arranged in a matrix shape, In a driving circuit of a Q-matrices fluorescent display tube formed by opposing Ｑ / 2 anode segments of each grid electrode and each anode segment row, the adjacent first grid electrode and the second grid electrode are turned on. Among the several anode segments which can be made to emit light by setting the above, R (integer) anode segments disposed one by one from the position closest to the first grid electrode and in the range of 1 to (Q / 2-1) facing the second grid electrode, and the second grid One selection pixel of the plurality of selection pixels arranged in order from the position closest to the electrode and in which a total of Q / 2 anode segments of (Ｑ / 2-R) anode segments facing the first grid electrode are selected and formed. Emits light in accordance with the display signal.

Another method for driving a fluorescent display tube according to the present invention is formed for each of the even-numbered positive integers Q of 8 or more, and is formed with Q anode lead-lines by connecting the anode segments having the same position in the column in the column direction. An anode segment row and a grid electrode extending in a row direction orthogonal to the anode segment row and having a grid lead line, the plurality of the anode segment row and the columns of the plurality of grid electrodes arranged in a matrix shape, A driving method of a fluorescent display tube for driving a Q-shaped anode matrix type fluorescent display tube formed by opposing each of the grid electrodes and the? / 2 anode segments in each anode segment row, the adjacent first grid electrode and Few anodes made light-emitting by turning on the second grid electrode Among the segments, R (integer) anode segments which are arranged in order from the position closest to the first grid electrode and which are any one of a range from 1 to (Q / 2-1) facing the second grid electrode; Of a plurality of selected pixels arranged in order from a position closest to the second grid electrode and having a total of Q / 2 anode segments selected from (Ｑ / 2-R) anode segments facing the first grid electrode; One selected pixel is made to emit light in accordance with the display signal.

According to the fluorescent display tube of the present invention, since one selection pixel is sequentially selected from a plurality of selection pixels facing two grid electrodes and emits light in accordance with a display signal, dark line irregularities generated at both ends of the selection pixel are generated. It can reduce generation | occurrence | production and can improve display quality.

1 is a conceptual diagram of an electrode structure seen from the display surface side of a fluorescence display tube VFD of an eight-anode matrix system of an embodiment.
FIG. 2 is a partially enlarged view of FIG. 1 showing a portion of the leader line from the anode segment. FIG.
3 is a conceptual diagram of an electrode structure seen from a cross section orthogonal to the display surface of the fluorescence display tube of the eight-anode matrix system of the embodiment.
It is a figure explaining the form of the display of the fluorescent display tube shown in FIG.
FIG. 5 is a diagram schematically showing a display nonuniformity generating portion which is a portion where a difference (display nonuniformity or dark line nonuniformity) of the luminance of the anode segment occurs.
It is a figure which shows typically the cause of display nonuniformity.
It is a figure which shows typically the drive method of embodiment.
It is a figure which shows typically the drive method of embodiment.
9 is a block diagram of a drive circuit of an embodiment for driving the fluorescent display tube of the embodiment.
10 is a timing diagram in the first frame.
11 is a timing diagram in a second frame.
12 is a timing diagram in a third frame.
It is a conceptual diagram which shows embodiment in the 16-layer anode matrix system.
Fig. 14 is a perspective cross-sectional view of a driver-embedded fluorescent display tube CIGVFD incorporating a drive circuit inside the fluorescent display tube.
Fig. 15 is a conceptual diagram showing an embodiment in the twelve anode matrix system.

The description of the following embodiments is divided for every eight or more positive integers M represented by powers of two, and the anode segments having the same position in the division are connected in the horizontal direction to connect the M anode leader lines. Having an anode segment row formed thereon and a grid electrode extending in a transverse direction orthogonal to the anode segment row and having a grid lead-out line, the plurality of anode segment rows and columns of the plurality of grid electrodes arranged in a matrix form, Regarding the anode matrix system of M formed by opposing each of the grid electrodes and the M / 2 anode segments in each of the anode segment rows, a fluorescent display tube, a driving circuit of the fluorescent display tube, and a driving method of the fluorescent display tube will be.

Of the M anode segments which are light-emitting by turning on the adjacent first grid electrode and the second grid electrode, they are sequentially arranged from the position closest to the first grid electrode and face the second grid electrode (M / 4 ) Anodes and a selection pixel formed by selecting (M / 4) anode segments which are arranged in order from the closest to the second grid electrode and opposing the first grid electrode, and from the position closest to the first grid electrode. (M / 4-J) anode segments disposed in turn and opposite to the second grid electrode, and (M / 4 + J) anodes placed in turn from the position closest to the second grid electrode and opposite to the first grid electrode 1 or a plurality of selected pixels formed by changing the value of J (integer) from 1 to 2 ^(K-3) so as to have a segment, and before the first grid (M / 4 + J) anode segments disposed in order from the position closest to the pole and facing the second grid electrode and (M / +) placed in order from the position closest to the second grid electrode and facing the first grid electrode (M / Characterized in that one selected pixel of one or a plurality of selected pixels formed by changing the value of J from 1 to 2 ^(K-3) so as to have 4-J) anode segments emits light according to the display signal do.

The fluorescence display tube of the eight-anode matrix system of the embodiment, the driving circuit of the fluorescent display tube, and the driving method of the fluorescent display tube will be described with reference to FIGS. 1 to 12 and FIG.

1 is a conceptual diagram of an electrode structure seen from the display surface side of a fluorescence display tube VFD of an eight-anode matrix system of an embodiment. The columns arranged in the transverse direction in the ground of FIG. 1 are columns, and the rows arranged in the longitudinal direction in the ground of FIG. 1 are rows. The grid electrode G ₁ is the "anode segment A, anode segment B, anode segment C, anode segment D" on the first row, the "anode segment A, anode segment B, anode segment C, anode segment D" on the second row, ... 1 to face the "anode segment A, anode segment B, anode segment C, anode segment D" on the m-1 line and the "anode segment A, anode segment B, anode segment C, anode segment D" on the m-th line. It extends in the longitudinal direction of the ground. The grid electrode G ₂ includes the first row "anode segment E, anode segment F, anode segment G, anode segment H", the second row "anode segment E, anode segment F, anode segment G, anode segment H", ... 1 to face the "anode segment E, anode segment F, anode segment G, anode segment H" on the m-1 line, and the "anode segment E, anode segment F, anode segment G, anode segment H" on the m-th line. It extends in the longitudinal direction of the ground. Similarly, grid electrode G ₃ (not shown in FIG. 1) ... Each of grid electrode G _{n -1} and grid electrode G _n is formed extending in the longitudinal direction of the sheet of FIG. 1. The direction in which the grid electrode G _1? G _n grid electrodes each, extending in the longitudinal direction, and a longitudinal direction orthogonal to the grid electrode G _1? G _n grid electrodes each extending in the transverse direction. Each grid electrode extending in the longitudinal direction is arranged in the transverse direction in order to the grid electrode G ₁ , the grid electrode G ₂ , ... the grid electrode G _{n -1} , and the grid electrode G _n .

In the example of FIG. 1, m-segmented anode segment rows and n-column grid electrodes are arranged in a matrix, and each of the grid electrodes and four anode segments of each anode segment row are formed to face each row. Further, one anode segment row is formed with 4 x n anode segments. The grid leader line DG ₁ is connected to the grid electrode G ₁ . Similarly, the grid electrode grid lead line DG ₂ is connected to G _2, and G _{n -1} ... grid electrode is a grid lead line DG _{n -1} and connected to the grid electrode G _n grid lead line DG in the _n Connected. In this way, n grid electrode leader lines are drawn out from each of the n grid electrodes.

Opposite each of the plurality of rows of grid electrodes, eight anode segments of anode segment A (anode segment with A in FIG. 1 squared) and anode segment H (anode segment with H in FIG. It is arranged in order repeatedly.

Anode segments having the same reference numerals located in the same row, which are arranged opposite to each of the grid electrodes, are connected to each other. For example, the first row anode segment A opposite the grid electrode G ₁ , the first row anode segment A opposite the grid electrode G ₃ (not shown in FIG. 1), the grid electrode G _{n −1} The anode segments A in the opposing first row are connected to each other. Similarly, anode segments B and A of the anode segments H are also connected to each other. That is, the anode segments are divided every eight in the lateral direction of the ground of FIG. 1, and the anode segments having the eight anode lead lines are formed by connecting the anode segments having the same position in the arrangement. have.

Thus, for each row of the first to m-th rows, a plurality of anode segments A connected to each other, a plurality of anode segments B connected to each other, a plurality of anode segments C connected to each other, and a plurality of connected to each other A fluorescent display tube having an anode segment D, a plurality of anode segments E connected to each other, a plurality of anode segments F connected to each other, a plurality of anode segments G connected to each other, and a plurality of anode segments H connected to each other are: It is called a fluorescent display tube of the anode matrix system. Generally, the anode segments arranged in a line are divided for each M (integer), and the fluorescent display tube driven by connecting the anode segments in which the arrangement position in the segment is in the same position is used as the anode matrix type fluorescent display tube of M. It is called.

FIG. 2 is a partially enlarged view of FIG. 1 showing a portion of the leader line from the anode segment. FIG. The anode leader DA ₁ is a leader line of the anode segment in the first row. The anode leader DA ₂ is a leader line of the anode segment of the second row. The anode lead line DA _m is a lead line of the m-th anode segment. The anode lead-out DA ₁ is the anode lead-out DA _1A from the anode segment A of the first row (arranged in the first row), the anode lead-out DA _1B from the anode segment B of the first row, and the anode from the anode segment C of the first row. Lead line DA _1C , anode lead line DA _1D from the first row of anode segments D, anode lead line DA _1E from the anode segment E of the first row, anode lead line DA _1F from the anode segment F of the first row, row 1 The anode leader line DA _1G from the anode segment G and the anode leader line DA _1H from the anode segment H of the first row are included. Similarly, the anode lead line DA ₂ has the anode lead line DA _2A from the anode segment of the second row (arranged in the second row) to the anode lead line DA _2H , and the anode lead line DA _m is arranged on the m line (array on the m line). Anode lead line DA _mA- anode lead line DA _mH from the anode segment. All anode segments from the first row to the m-th row are connected in this manner, and 8 x m anode leader lines are drawn out.

Fig. 3 is a conceptual diagram of the electrode structure seen from the cross section orthogonal to the display surface of the eight-anode matrix fluorescent display tube. It can be seen from FIG. 3 that the arrangement relationship between the anode segment A, the anode segment H, the grid electrode and the cathode is shown. The grid electrode is in the form of a metal mesh and controls whether or not electrons generated at the cathode pass through the grid electrode. ON is applied when a positive voltage is applied to the grid electrode to apply the positive voltage to the grid electrode, so that the electron does not penetrate the grid electrode because the positive voltage is not applied to the grid electrode. In order not to provide a positive voltage to the grid leader line, it is called OFF.

Phosphors are applied to the anode segments A to Anode segment H and emit light by collision of electrons. In this case, the positive voltage for the cathode sufficient to transmit electrons is applied to the grid electrode, and the positive voltage for the cathode sufficient to accelerate the electrons is applied to the anode segment opposite the grid electrode. Only the corresponding anode segment emits light. That is, from the display surface of the fluorescent display tube, the anode segment facing the grid electrode to which the positive voltage is applied (turned ON) is formed in the grid electrode formed extending in the transverse direction of the sheet of FIG. However, of the eight anode segments that can be made to emit light, only the anode segment which emits light is actually the anode segment to which a positive voltage is applied.

It is a figure explaining the form of the display of the fluorescent display tube shown in FIG. In the display of the fluorescent display tube, two adjacent grid electrodes are simultaneously selected, and a positive voltage is applied to the two grid electrodes. For example, FIG. 4A shows a case in which a positive voltage such as electrons can be transmitted to the grid electrode G ₁ and the grid electrode G ₂ . FIG. 4B shows a case where a positive voltage, such as electrons, can be applied to the grid electrode G ₂ and the grid electrode G ₃ . FIG. 4C shows a case where a positive voltage as permeable to electrons is applied to the grid electrode G ₃ and the grid electrode G ₄ .

The basic form of light emission in the embodiment applies a positive voltage to two adjacent grid electrodes and arranges them in order starting from the position closest to the other adjacent grid electrodes among the eight anode segments facing the two grid electrodes. Only a portion of the 2x2 (four in total) anode segments facing each of the two grid electrodes, i.e., the portion where the electric field strength of the space between the anode segment and the cathode becomes the most uniform, is made to emit light.

With reference to FIG. 4, the form of light emission is demonstrated to a concrete example below. For example, an example in which the light emitting unit is moved from left to right will be described. In order to see the movement of the light emitting portion, the moving speed of the light emitting portion is generally slower than the scanning speed of one frame described later.

A definition such that the anode segment emits light with respect to the anode lead line applied to the grid electrode G ₁ and the grid electrode G ₂ and connected to each of the anode segment C, the anode segment D, the anode segment E, and the anode segment F. FIG. Voltage is applied (see Fig. 4 (a)). A definition such that the anode segment emits light with respect to the anode lead line applied to the grid electrode G ₂ and the grid electrode G ₃ and connected to each of the anode segment G, the anode segment H, the anode segment A, and the anode segment B. A voltage is applied (see FIG. 4 (b)). A definition such that the anode segment emits light with respect to an anode lead line applied to the grid electrode G ₃ and the grid electrode G ₄ and connected to each of the anode segment C, anode segment D, anode segment E, and anode segment F. FIG. A voltage is applied (see FIG. 4 (c)). As a result, in FIG. 4, the anode segments that are hatched are sequentially observed as shown in FIGS. 4A, 4B, and 4C, and visually observed so that the light emitting portions move. do. However, the scanning speed of the grid electrode is fast, so that the movement of the light emitting part in the transverse direction from Figs. 4 (a), 4 (b) and 4 (c) is difficult to observe with the naked eye. 4 (a), 4 (b) and 4 (c) show the display modes in different frames in the embodiment.

In the following description, the application of the positive voltage to the anode segment is turned ON, and the application of the positive voltage to the anode segment is turned OFF.

As described above, in the control of the grid electrode, two grid electrodes sequentially adjacent to the column direction are selected to be turned ON, and for example, the grid electrode G ₁ and the grid electrode G ₂ located at the left _end are selected and selected. The positions of the electrodes to be sequentially moved to the right side, and finally, the grid electrode G _n-1 and the grid electrode G _n are selected. This series of processing is called processing of one frame. In the above-described example, the case where the display moves is explained. However, even in the case where the display does not move, the processing of one frame that sequentially selects two grid electrodes is always performed regardless of how the anode segment is processed. Is executed.

As described above, in the embodiment, the two grid electrodes are turned on so that only the continuous specific anode segments in the anode segments facing the grid are emitted. This continuous area that emits light simultaneously is called a pixel. That is, light emission of the anode segment is performed in units of pixels. When there are a plurality of types of pixels corresponding to two grid electrodes, one pixel selected from the plurality of types is called a selection pixel.

In the eight-anode matrix fluorescent lamp of the embodiment, four selected anode segments (these four anode segments are in close positions as shown in Fig. 4) out of eight anode segments form one pixel, The pixel differs depending on which position the four anode segments are selected. One pixel in which the combination of the positions of these four anode segments is selected from other pixels is the above-described selection pixel. Although details will be described later, in the multi-anode matrix type fluorescent display tube of the embodiment, the selection pixel is specified in accordance with the display signal (see FIG. 9), and the ON and OFF of the selection pixel are controlled in accordance with the display contents specified by the display signal. In accordance with the synchronization signal included in the display signal, two grid electrodes are sequentially turned ON to display one frame.

Referring to FIG. 4, a pixel of a fluorescent display tube of an eight-anode matrix type will be described in detail. The following eight types of combinations exist as pixels in the case where two adjacent grid electrodes are simultaneously turned on to form one pixel from four consecutive anode segments among eight opposing anode segments. Pixel consisting of "anode segment A, anode segment B, anode segment C, anode segment D". Pixel consisting of "anode segment B, anode segment C, anode segment D, anode segment E". A pixel consisting of "anode segment C, anode segment D, anode segment E, anode segment F". Pixel consisting of "anode segment D, anode segment E, anode segment F, anode segment G". A pixel consisting of "anode segment E, anode segment F, anode segment G, anode segment H". Pixel consisting of "anode segment F, anode segment G, anode segment H, anode segment A". Pixel consisting of "anode segment G, anode segment H, anode segment A, anode segment B". Pixel consisting of "anode segment H, anode segment A, anode segment B, anode segment C". Further, the pixels in the case of forming one pixel from four consecutive anode segments in which at least one anode segment faces each grid electrode include "anode segment A, anode segment B, anode segment C, anode segment D" and The pixel consisting of "anode segment E, anode segment F, anode segment G, anode segment H" is excluded and there are six types of combinations.

Referring to FIG. 4, an example of a selection pixel of an eight-anode matrix fluorescent display tube will be described in detail. In Fig. 4A, an anode segment C, an anode segment D, an anode segment E, and an anode segment F constitute a selection pixel. In Fig. 4B, the anode segment G, the anode segment H, the anode segment A, and the anode segment B constitute a selection pixel. In Fig. 4C, the anode segment C, the anode segment D, the anode segment E, and the anode segment F constitute a selection pixel. In the example shown in FIG. 4, two anode segments close to each other by one grid electrode are selected as the selection pixel from each of the four anode segments facing one of the two adjacent grid electrodes which are simultaneously turned ON by applying a positive voltage. By emitting the selected pixel, the luminance of the display is made uniform.

In the control of the anode segment, the control is simultaneously performed for all the anode segments belonging to the row in synchronization with the selection of the grid electrode. Whether the anode segment is made to emit light is controlled depending on whether the anode lead line of each row is turned ON or OFF. That is, an anode segment connected to the anode leader line turned ON constitutes the selection pixel, and an anode segment connected to the anode leader line turned OFF does not constitute the selection pixel. As described above, the control of the selection pixel is executed in units of rows. The detail of the drive circuit for performing such control is mentioned later.

With reference to the structure shown in FIG. 4, it demonstrates in detail how to select the anode segment which comprises a selection pixel. First, the difference in luminance between the anode segments included in the selected pixel will be described. For example, when the grid electrode G ₁ and the grid electrode G ₂ are turned ON and the grid electrode G ₃ is turned OFF, the anode pixel G and the anode segment F are included in the selected pixel to emit light (in FIG. 4). The luminance of the anode segment G in this light emitting state (not shown) is lower than that of the anode segment F. FIG. In the case where the grid electrode G ₁ and the grid electrode G ₂ are turned ON and the grid electrode G ₃ is turned OFF, the anode segment H and the anode segment G are included in the selected pixel to emit light (this light emission is shown in FIG. 4). The brightness of the anode segment H of the state (not shown) becomes lower than the brightness of the anode segment G. This difference in luminance occurs because the influence of the grid electrode G ₃ , which is turned OFF, becomes more intense in the order of the anode segment H, the anode segment G, and the anode segment F as the grid electrode G ₃ gets closer.

When the grid electrode G ₁ and the grid electrode G ₂ are turned ON and the grid electrode G ₃ is turned OFF, the anode segment C, the anode segment D, the anode segment E, and the anode segment F emit light as a selection pixel. (See FIG. 4 (a)), the inventors of the present application have observed that not only the luminance of the anode segment F is lower than that of the anode segment E, but also the difference in the luminance also occurs inside the anode segment F. Similarly, the luminance of the anode segment C is not only lower than that of the anode segment D, but also the difference in the luminance inside the anode segment C is observed.

5 is a display in which a difference (display unevenness or dark line unevenness) in luminance occurs inside the anode segment C, and a portion in which a difference in luminance (display unevenness or dark line unevenness) occurs in the anode segment F is shown. It is a figure which shows typically a nonuniformity generating part. This display nonuniformity occurs at the both ends of the selection pixel (composed of anode segment C, anode segment D, anode segment E, and anode segment F in Fig. 4A). Here, the anode segments adjacent to both ends of the selection pixel are turned off. That is, the reason for such a difference in luminance is caused by the effect of the anode segment G turned off adjacent to one end of the selection pixel to the anode segment F and the influence of the anode segment B turned off adjacent to the other end of the selection pixel. This is because it extends to this anode segment C.

As a result of such display unevenness, a dark line (a line formed by the light emitting portion whose brightness is decreased by one step) occurs in the longitudinal direction, and the display quality deteriorates. Although the length of the dark line in the longitudinal direction varies depending on the content (image) of the displayed display, in the case of the display in which the border line of the dark and dark elongates in the longitudinal direction, the vertical line shape is undesirable for the light portion near the boundary line of the dark and dark. Long dark lines of the eye are observed with the naked eye, and deterioration of display quality progresses remarkably.

It is a figure which shows typically the cause of display nonuniformity. The electrons are accelerated by the anode segment turned ON. If the equipotential surface is parallel to the plane on which the anode segment is disposed, the electrons collide perpendicularly to the anode segment which is turned ON, and the light emission luminances of the anode segment C, anode segment D, anode segment E, and anode segment F have the same luminance. do. However, since the anode segment B and the anode segment G are turned off, the equipotential surface does not become parallel to the surface on which the anode segment is disposed in the vicinity of the both end lines of the selection pixel. In the anode segment C and the anode segment F near the both end lines of the selection pixel, the former is bent in the inner direction of the selection pixel (see angle α in FIG. 6). This phenomenon is called electron vignetting.

The electrons are bent by the anode segment G which is turned OFF and close to the anode segment G of the anode segment F by electron vignetting, and dark line nonuniformity arises. In addition, the electrons are bent by the anode segment B which is turned OFF at the end portion close to the anode segment B of the anode segment C by electron vignetting, and dark line nonuniformity occurs.

7 and 8 are diagrams schematically showing the driving method of the embodiment. In FIG. 7, the grid electrode G ₁ is turned on as the first grid electrode and the grid electrode G ₂ is turned on as the second grid electrode. In FIG. 8, the position of the grid electrode to be turned on is shifted, and the grid electrode G ₂ is turned on as the first grid electrode and the grid electrode G ₃ is turned on as the second grid electrode. In the embodiment, dark line unevenness is prevented from occurring by changing the relative position of the selected pixel to emit light for each frame with respect to the grid electrode. 7 (a) and 8 (a) show the form of the display in the first frame, and FIGS. 7 (b) and 8 (b) show the form of the display in the second frame. 7 (c) and 8 (c) show the forms of the display in the third frame. That is, the form of the display in the first frame-the form of the display in the third frame is repeatedly displayed, and one set of three frames is displayed on the fluorescent display tube. Here, one frame refers to one display that covers the entire surface of the fluorescent display tube.

Grid electrode G _1, G ₂ is a grid electrode and a description is given of the case that is turned ON. As shown in Fig. 7A, for the first frame, the selection pixel is composed of an anode segment C, an anode segment D, an anode segment E, and an anode segment F. When the selected pixels emit light, positive voltages are applied to these anode segments, and when they do not emit light, the pixels are turned off by not applying a positive voltage to these anode segments. This ON and OFF control is based on the contents of the display signal (see Fig. 9) from the outside. As shown in Fig. 7B, for the second frame, the selection pixel is composed of an anode segment B, an anode segment C, an anode segment D, and an anode segment E. As shown in Fig. 7C, for the third frame, the selection pixel is composed of an anode segment D, an anode segment E, an anode segment F, and an anode segment G.

Grid electrode G _2, G ₃ grid electrode plays a description is given of the case that is turned ON. As shown in Fig. 8A, the selection pixel is composed of an anode segment G, an anode segment H, an anode segment A, and an anode segment B with respect to the first frame. As shown in Fig. 8B, for the second frame, the selection pixel is composed of an anode segment F, an anode segment G, an anode segment H, and an anode segment A. As shown in Fig. 8C, for the third frame, the selection pixel is composed of an anode segment H, an anode segment A, an anode segment B, and an anode segment C.

In this way, the occurrence of dark line unevenness can be prevented by shifting the arrangement of the anode segments that emit light for each frame. In addition, since the display contents change quickly during one set (three frames) of time, and one set of time is shorter than the afterimage time left in the eye, there is a dark line unevenness that is one column in the longitudinal direction for each frame. Even if it occurs, since the position of the dark line nonuniformity is different for each frame, the dark line nonuniformity is not observed visually so that it becomes 1 row by an afterimage.

9 is a block diagram of a drive circuit of an embodiment for driving the fluorescent display tube of the above-described embodiment. The drive circuit 10 is formed with an external interface 11, a RAM 12, a counter 13, a frame counter 14, and a timing generator 15. The area | region enclosed by the broken line of the drive circuit 10 is a component for preventing generation | occurrence | production of dark line nonuniformity. The structure part for preventing generation | occurrence | production of dark line nonuniformity is comprised with a part of the frame counter 14 and the timing generator 15. As shown in FIG.

The display signal from the outside, which is a time series signal, is input to the RAM 12 via the external interface 11. The RAM 12 stores a display signal from the outside in each predetermined area of the RAM 12 in order to display a two-dimensional image on the fluorescent display tube based on the display signal from the outside. The timing generator 15 reads a display signal from the outside stored in each predetermined area of the RAM 12 using the timing generator clock signal obtained by dividing a clock signal as a master clock as a reference clock signal. In addition, the timing generator 15 outputs a signal for repeatedly selecting any one of the frames of the first frame, the second frame, and the third frame from the frame counter 14. The timing generator 15 then outputs m total anode signals for each of the anode lead-out lines DA _{1 to the} anode lead-out lines DA _m . In addition, the timing generator 15 outputs a total of n grid signals for each of the grid leader line DG _{1 to} grid leader line DG _n .

10 and 12 are timing diagrams of an anode signal output to the anode leader line DA ₁ and a grid signal output to each of the grid leader line DG _{1 to} grid leader line DG _n . Here, the frame period is a period of updating one display that covers the entire surface of the fluorescent display tube, that is, when the grid electrodes are repeatedly turned on sequentially, the time when the first grid electrode is turned off to on is the last time. The time between turning on and off the grid electrode as the end is referred to as the time between the time and the end. In addition, one segment period refers to the minimum unit period which switches ON and OFF of an anode segment. The one segment period is also the minimum unit period for switching the grid electrodes ON and OFF, and during the two segment periods, each grid electrode is turned ON.

10 is a timing diagram in the first frame. 11 is a timing diagram in a second frame. 12 is a timing diagram in a third frame. 10? Is the substrate 12 is omitted for the grid lead line DG _{4? N-2} and the grid lead line DG, the substrate is omitted, also the anode lead line DA _2? DA anode lead line _m.

As shown in Fig. 10, when the grid electrode G ₁ is a first grid electrode, the grid electrode G ₂ is the grid electrode drawn out such that the ON a second grid electrode line DG _1, the grid electrode lead line DG ₂ is to be turned ON, the first In one frame, each of the selected pixels (anode segment C, anode segment D, anode segment E, anode segment F) is in unit of one segment period in accordance with a display signal from the outside, and is simultaneously ON (high level in FIG. 10). And other anode segments other than the anode segment corresponding to the selected pixel are turned OFF. When the grid electrode lead-out line DG ₂ and the grid electrode lead-out line DG ₃ are turned on so that the grid electrode G ₂ is turned on as the first grid electrode and the grid electrode G ₃ is turned on as the second grid electrode, the selection pixel ( Each of the anode segment G, the anode segment H, the anode segment A, and the anode segment B are simultaneously turned on in units of one segment period according to the display signal from the outside, and other anode segments other than the anode segment corresponding to the selected pixel. Is turned off.

As shown in Figure 11, when the grid electrode G ₁ is a first grid electrode, the grid electrode G ₂ is the grid electrode drawn out such that the ON a second grid electrode line DG _1, the grid electrode lead line DG ₂ is to be turned ON, the first In two frames, each of the selected pixels (anode segment B, anode segment C, anode segment D, and anode segment E) is in unit of one segment period in accordance with a display signal from the outside, and is simultaneously ON (high level in FIG. 11). Then, other anode segments other than the anode segment corresponding to the selected pixel are turned off. When the grid electrode lead-out line DG ₂ and the grid electrode lead-out line DG ₃ are turned on so that the grid electrode G ₂ is turned on as the first grid electrode and the grid electrode G ₃ is turned on as the second grid electrode, the selected pixel (anode segment F, anode) Each of the segment G, the anode segment H, and the anode segment A is simultaneously turned on in units of one segment period in accordance with a display signal from the outside, and anode segments other than the anode segment corresponding to the selected pixel are turned off.

As shown in Figure 12, when the grid electrode G ₁ is a first grid electrode, the grid electrode G ₂ is the grid electrode drawn out such that the ON a second grid electrode line DG _1, the grid electrode lead line DG ₂ is to be turned ON, the first In three frames, each of the selected pixels (anode segment D, anode segment E, anode segment F, anode segment G) is ON at the same time in units of one segment period in accordance with an external display signal (high level in FIG. 11). Then, other anode segments other than the anode segment corresponding to the selected pixel are turned off. When the grid electrode lead-out line DG ₂ and the grid electrode lead-out line DG ₃ are turned on so that the grid electrode G ₂ is turned on as the first grid electrode and the grid electrode G ₃ is turned on as the second grid electrode, the selected pixel (anode segment H, anode) Each of segment A, anode segment B, and anode segment C is simultaneously turned on in units of one segment period in accordance with an external display signal, and anode segments other than the anode segment corresponding to the selected pixel are turned off. Here, the grid electrode G ₁ G _n grid electrodes adjacent grid electrode 2 at the same time on the repetition time by sequentially to (one frame time) to in, for example, is about 20msec (ms). In this manner, the luminance obtained by averaging the luminance in each frame is visually observed, and as a result, the dark line unevenness becomes inconspicuous.

10 to 12, the following combinations can be selected as pixels of one frame. In the following description, grid electrodes G ₁ (odd rows) and grid electrodes G ₃ (odd rows) are described as odd rows, and grid electrodes G ₂ (even rows) are described as even rows.

When (Anode Segment C, Anode Segment D, Anode Segment E, Anode Segment F) is selected pixel when grid electrode G ₁ (odd row) and grid electrode G ₂ (even row) are turned on (see FIG. 10). In (), when grid electrode G ₂ (even row) and grid electrode G ₃ (odd row) are turned on, (anode segment F, anode segment G, anode segment H, anode segment A) is selected pixel ( 11) or (anode segment H, anode segment A, anode segment B, anode segment C) may be selected pixels (see FIG. 12).

When (Anode Segment B, Anode Segment C, Anode Segment D, Anode Segment E) are selected pixels when grid electrode G ₁ (odd sequence) and grid electrode G ₂ (even sequence) are turned on (see FIG. 11). In (), when grid electrode G ₂ (even rows) and grid electrode G ₃ (odd columns) are turned on, (anode segment G, anode segment H, anode segment A, anode segment B) are selected pixels ( 10) or (anode segment H, anode segment A, anode segment B, anode segment C) may be selected pixels (see FIG. 12).

When (Anode Segment D, Anode Segment E, Anode Segment F, Anode Segment G) is selected pixel when grid electrode G ₁ (odd row) and grid electrode G ₂ (even row) are turned on (see FIG. 12). In (), when grid electrode G ₂ (even rows) and grid electrode G ₃ (odd columns) are turned on, (anode segment G, anode segment H, anode segment A, anode segment B) are selected pixels ( 10) or (anode segment F, anode segment G, anode segment H, anode segment A) may be selected pixels (see FIG. 11).

Furthermore, in addition to selecting the selection pixel for each frame as described above, in one frame, the selection pixel may be selected as follows. When grid electrode G ₁ (odd row) and grid electrode G ₂ (even row) are turned on (anode segment C, anode segment D, anode segment E, anode segment F), (anode segment B, anode segment C) , Anode Segment D, Anode Segment E), (Anode Segment D, Anode Segment E, Anode Segment F, Anode Segment G) selects any selected pixel, and selects grid electrode G ₂ (even rows) and grid electrode G _When (odd sequence) is ON, (anode segment G, anode segment H, anode segment A, anode segment B), (anode segment F, anode segment G, anode segment H, anode segment A), (anode) The selection pixel of any one of the segment H, the anode segment A, the anode segment B, and the anode segment C) may be selected.

When the fluorescence display tube of the eight-anode matrix system of the above-described embodiment is driven by the above-described driving method, the following effects are produced.

First, by simultaneously lighting four segments in one segment period, the duty factor becomes four times as in the case of the single matrix method. As a result, four times the luminance of the single matrix system can be obtained. From another viewpoint, when the number of segments is the same, the voltage of the grid electrode required for obtaining the same luminance as in the single matrix method can be lowered. By lowering the voltage of the grid electrode, the voltage of the power supply circuit can be lowered, thereby expanding the environment in which a graphic display using a fluorescent display tube can be used. Further, a low withstand voltage can be used for the drive element for driving the grid electrode, and the cost of the drive element, and moreover, the drive device can be reduced.

Next, of the four anode segments which are made light-emitting by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are sequentially arranged from the position closest to the first grid electrode, and the second Nine (one to three) anode segments opposed to the grid electrode and Nine (four to X) anode segments disposed in order from the position closest to the second grid electrode and opposite to the first grid electrode. By emitting the selected pixels formed by selecting (see Figs. 10 to 12), it is possible to reduce the deterioration of the display quality imparted by the potentials of the grid electrodes which are adjacent to OFF.

In addition, the positions of the four anode segments emitting light as the selection pixels are arranged in order from each of the frames closest to the first grid electrode and opposite to the second grid electrode, and the two anode segments closest to the second grid electrode. Two anode segments arranged in sequence from the position and opposite to the first grid electrode are selected to emit light (the first frame in FIG. 10), and are arranged in sequence from the position closest to the first grid electrode and the second grid One anode segment facing the electrode and three anode segments disposed in order from the position closest to the second grid electrode and opposing the first grid electrode are selected to emit light (second frame of FIG. 11); State), before the second grid disposed in a position close to the first grid electrode side A total of four anode segments facing one of the three anode segments opposed to and one anode segment facing the first grid electrode disposed at a position close to the second grid electrode side are emitted as a selection pixel (third in FIG. 12). By repetition of these three frames in the proper order as one set, it is possible to make the display quality deterioration, that is, the display unevenness, which is imparted by the potentials of the anode segments adjacent to OFF become inconspicuous.

Modifications of the above-described embodiment will be described below.

Instead of repeating the state of the first frame, the state of the second frame, and the state of the third frame, one of three states of the state of the first frame and the state of the third frame is sequentially selected, and three frames are selected as one. You may repeat as a set. Specifically, by sequentially repeating the state of the third frame, the state of the second frame, and the state of the first frame, the display quality deterioration, that is, the display unevenness, which is imparted by the potential of the anode segment adjacent to OFF can be reduced. Can be.

It is a conceptual diagram which shows embodiment in the 16-layer anode matrix system. Also in the 16-node anode matrix system, the same driving method as the above-mentioned 8-node anode matrix system can be adopted. FIG. 13 (a) shows the state of the first frame when the grid electrode G ₁ is turned on as the first grid electrode and the grid electrode G ₂ is the second grid electrode, and FIG. 13 (b) shows the second frame. 13 (c) shows the state of the third frame, FIG. 13 (d) shows the state of the fourth frame, and FIG. 13 (e) shows the state of the fifth frame. Anode segment A, anode segment B, anode segment C, anode segment D, anode segment E, anode segment G, anode segment G, anode segment H, anode segment I, anode segment J, anode segment K in the sixteen anode matrix method. 16 anode segments, i.e., an anode segment L, an anode segment M, an anode segment N, an anode segment O, and an anode segment P, are included in one division.

As shown in Fig. 13 (a), in the case where G ₁ is turned on as the first grid electrode and grid electrode G ₂ is turned on as the second grid electrode, anode segment E and anode segment constituting the selection pixel in the first frame. Each of F, Anode Segment G, Anode Segment H, Anode Segment I, Anode Segment J, Anode Segment K, and Anode Segment L is simultaneously turned on in units of one segment period in accordance with a display signal from the outside, and other anode segments Is turned off.

As shown in Fig. 13 (b), when G ₁ is turned on as the first grid electrode and grid electrode G ₂ is turned on as the second grid electrode, anode segment D and anode segment constituting the selection pixel in the second frame. Each of E, anode segment F, anode segment G, anode segment H, anode segment I, anode segment J, and anode segment K are simultaneously turned ON in units of one segment period in accordance with an external display signal, and the other anode segment Is turned off.

As shown in Fig. 13 (c), when G ₁ is turned on as the first grid electrode and grid electrode G ₂ is turned on as the second grid electrode, the anode segment C and the anode segment constituting the selection pixel in the third frame. Each of D, anode segment E, anode segment F, anode segment G, anode segment H, anode segment I, and anode segment J is turned on at the same time in units of one segment period in accordance with a display signal from the outside, and the other anode segment Is turned off.

As shown in Fig. 13 (d), when G ₁ is turned on as the first grid electrode and grid electrode G ₂ is turned on as the second grid electrode, the anode segment F and the anode segment constituting the selection pixel in the fourth frame. Each of G, anode segment H, anode segment I, anode segment J, anode segment K, anode segment L, and anode segment M is simultaneously turned on in units of one segment period in accordance with a display signal from the outside, and the other anode segment Is turned off.

As shown in Fig. 13E, in the fifth frame, when the G ₁ is turned on as the first grid electrode and the grid electrode G ₂ is turned on as the second grid electrode, the anode segment G and the anode segment constitute a selection pixel. Each of H, Anode Segment I, Anode Segment J, Anode Segment K, Anode Segment L, Anode Segment M, and Anode Segment N are turned on at the same time in units of one segment period in accordance with a display signal from the outside, and other anode segments Is turned off.

In the case where the grid electrode G ₂ is the first grid electrode and the grid electrode G ₃ (the grid electrode not shown in FIG. 13 adjacent to the grid electrode G ₂ ) is turned on as the second grid electrode, the following anode segments Configure the selection pixel. In the first frame, an anode segment M, an anode segment N, an anode segment O, an anode segment P, an anode segment A, an anode segment B, an anode segment C, and an anode segment D constitute a selection pixel. In the second frame, an anode segment L, an anode segment M, an anode segment N, an anode segment O, an anode segment P, an anode segment A, an anode segment B, and an anode segment C constitute a selection pixel. In the third frame, the anode segment K, the anode segment L, the anode segment M, the anode segment N, the anode segment O, the anode segment P, the anode segment A, and the anode segment B constitute a selection pixel. In the fourth frame, an anode segment N, an anode segment O, an anode segment P, an anode segment A, an anode segment B, an anode segment C, an anode segment D, and an anode segment E constitute a selection pixel. In the fifth frame, an anode segment O, an anode segment P, an anode segment A, an anode segment B, an anode segment C, an anode segment D, an anode segment E, and an anode segment F constitute a selection pixel.

That is, in the state of the first frame, from the position closest to the first grid electrode, among the 16 anode segments that are capable of emitting light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), A total of eight anode segments arranged in turn and opposing the second grid electrode and four anode segments opposing the first grid electrode arranged in a position proximate to the second grid electrode side emit light as a selection pixel. Let's do it.

In the state of the second frame, among the 16 anode segments that can emit light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are arranged in order from the position closest to the first grid electrode. And a total of eight anode segments facing the second grid electrode and five anode segments facing the first grid electrode disposed at a position proximate to the second grid electrode side to emit light as a selection pixel.

In the state of the third frame, among the 16 anode segments that are capable of emitting light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are arranged in order from the position closest to the first grid electrode. A total of eight anode segments opposing the second grid electrode and six anode segments opposing the first grid electrode disposed at a position proximate to the second grid electrode side to emit light as a selection pixel. .

In the state of the fourth frame, among the 16 anode segments that can emit light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are arranged in order from the position closest to the first grid electrode. And a total of eight anode segments facing the second grid electrode and three anode segments facing the first grid electrode disposed at a position proximate to the second grid electrode side to emit light as a selection pixel.

In the state of the fifth frame, among the 16 anode segments that are capable of emitting light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are arranged in order from the position closest to the first grid electrode. And a total of eight anode segments opposing the second grid electrode and two anode segments opposing the first grid electrode arranged at a position proximate to the second grid electrode side to emit light as a selection pixel.

In short, the general description of the technique of the fluorescent display tube of the embodiment of the anode matrix system in M, where M is a positive integer represented by a power of 2 of 8 or more, is as follows.

The structure of the mechanism part of the anode-matrix fluorescent display tube of M of this embodiment is divided every 8 or more positive integers M which are represented by the power of 2, and the anode segment in which the arrangement | positioning in the division is in the same position to the horizontal direction is carried out. A plurality of anode segment rows and a plurality of grid electrodes having a plurality of anode segment rows and grid electrodes extending in a longitudinal direction orthogonal to the anode segment rows and having grid lead lines. The columns are arranged in a matrix so that the M / 2 anode segments in each of the grid electrodes and each of the anode segment rows are formed to face each other.

Here, the driving circuit may be disposed outside or inside the fluorescent display tube of the anode matrix type of M. When arrange | positioned outside, the fluorescent display tube which has a structure shown in FIG. 1, and the drive circuit 10 shown in FIG. 9 are connected by many wirings. On the other hand, when arrange | positioning inside, the objective can be achieved by few wiring (lead).

Fig. 14 is a perspective cross-sectional view of a driver-embedded fluorescent display tube CIGVFD incorporating a drive circuit inside the fluorescent display tube. The driver-embedded fluorescent display tube 30 includes a cathode 31, a grid electrode 32, an anode segment 33, a base plate 34, a filament lead 35, a driver chip lead 36, and a driving circuit 10. Has as the main component.

The cathode 31 is coated with oxides of Ba, Sr, and Ca on a tungsten core wire (filament). Voltage is applied to both ends of the filament to generate electrons (thermal electrons). The grid electrode 32 is similar to the grid electrode G _{1 to the} grid electrode G _n described above. The anode segment 33 is similar to the anode segment A to anode segment H described above. The base plate 34 is a glass substrate, uses a soder lime glass, and the inside thereof becomes a vacuum. The filament lead 35 is connected to the filament forming the cathode 31. The driver chip lead 36 includes a terminal for inputting a display signal (see FIG. 9) and a terminal for inputting a clock signal (see FIG. 9). The drive circuit 10 is the IC of the drive circuit 10 shown in FIG.

On the base plate 34, the members of the cathode 31, the grid electrode 32, the anode segment 33, the filament lead 35, the driver chip lead 36, and the drive circuit 10 are fixed. The pattern which connects each member with each other is formed. In this way, by assembling the drive circuit 10 inside the mechanism portion of the driver-embedded fluorescent display tube 30, an electrode required for driving the driver-embedded fluorescent display tube 30 includes a filament lead 35. Only the lead for the power supply and the lead 36 for the driver chip can be used, and the external lead can be greatly reduced.

The fluorescent display tube is controlled as follows by a driving circuit disposed either inside or outside of the anode matrix type fluorescent display tube of M.

Display of the selection pixel of one of the selection pixels comprised by the following (M / 2) anode segments among M anode segments which can be light-emitted by turning on the adjacent 1st grid electrode and the 2nd grid electrode. It emits light according to the signal.

(M / 4) anode segments disposed in order from the position closest to the first grid electrode and opposite the second grid electrode and (M /) placed in order from the position closest to the second grid electrode and facing the first grid electrode (M / 4) A selection pixel formed by the anode segments.

(M / 4-J) anode segments disposed in order from the position closest to the first grid electrode and opposite the second grid electrode, and disposed in order from the position closest to the second grid electrode and opposite the first grid electrode. 2 ^(K-3) selection pixels that are formed by changing the value of J (integer) from 1 to 2 ^(K-3) so as to have (M / 4 + J) anode segments.

(M / 4 + J) anode segments disposed in order from the position closest to the first grid electrode and opposite the second grid electrode, and disposed in order from the position closest to the second grid electrode and opposite the first grid electrode. 2 ^(K-3) selection pixels that are formed by changing the value of J (integer) from 1 to 2 ^(K-3) so as to have (M / 4-J) anode segments.

Therefore, the total number of selection pixels is one + two ^(K-3) pieces + two ^(K-3) pieces, and one of the plurality of selection pixels is selected for each frame.

Here, the number of anode segments included in the selection pixel will be described. In the technique of the eight-layer anode matrix and the sixteen-layer anode matrix of the above-described embodiment, the number of anode segments that simultaneously emit light by turning two adjacent grid electrodes ON, that is, the number of anode segments constituting the selected pixel is 8 Four in the middle anode matrix method and eight in the sixteen anode matrix method. In the anode matrix system of M of the embodiment, the number of anode segments constituting the selection pixel is M / 2. The reason why the number of anode segments emitting light at the same time is M / 2 is that the effect of reducing the influence of the two grid electrodes to be OFF on the left and right sides of the two grid electrodes to be ON at the same time, and the effect of improving the duty factor As the balance point of, M / 2 is selected. Further, in order to make the effect of reducing the influence of the two grid electrodes on the left and right sides of the two grid electrodes turned ON at the same time better, the number of anode segments constituting the selected pixel is further increased. The less you get, the greater the effect. On the other hand, the smaller the number of anode segments constituting the selected pixel, the lower the duty factor.

Embodiment in the above-mentioned eight-layer anode matrix system is applied to the above-mentioned general formula. In the eight-node anode matrix, M = 8, K = 3, 2 ^(K-3) = 1, J = 1.

Selection composed of the following four (M / 2) anode segments among the eight (M) anode segments that are capable of emitting light by turning on adjacent first and second grid electrodes One selected pixel of the pixel is caused to emit light in accordance with the display signal.

From the four (M / 2) anode segments which are light-emittable by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are sequentially positioned from the position closest to the first grid electrode. Two (M / 4) anode segments disposed and opposite the second grid electrode, and two (M / 4) disposed sequentially from the position closest to the second grid electrode and opposite the first grid electrode. A selection pixel in which an anode segment is selected and formed (see Fig. 7 (a)).

One ((M / 4-J)) anode segment disposed in order from the position closest to the first grid electrode and facing the second grid electrode, and sequentially disposed from the position closest to the second grid electrode and the first A selection pixel formed by selecting three ((M / 4 + J)) anode segments facing the grid electrode (see Fig. 7 (b)).

Three ((M / 4 + J)) anode segments disposed in order from the position closest to the first grid electrode and opposite to the second grid electrode, and sequentially arranged from the position closest to the second grid electrode, and the first A selection pixel formed by selecting one ((M / 4-J)) anode segment facing the grid electrode (see Fig. 7 (c)).

The embodiment in the above-described sixteen-anode matrix system is applied to the above general formula. In the 16-node anode matrix, M = 16, K = 4, 2 ^(K-3) = 2, J = 1, 2.

Of the 16 anode segments enabled to emit light by turning on the adjacent first grid electrode and the second grid electrode, one of the selection pixels constituted by the following eight anode segments emits light according to the display signal Let's do it.

From eight (M / 2) anode segments which can be light-emitted by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are sequentially positioned from the position closest to the first grid electrode. Four (M / 4) anode segments disposed and opposite the second grid electrode, and four (M / 4) disposed sequentially from the position closest to the second grid electrode and opposite the first grid electrode. A selection pixel in which an anode segment is selected and formed (see Fig. 13 (a)).

In J = 1, three ((M / 4-J)) anode segments disposed in order from the position closest to the first grid electrode and facing the second grid electrode, and the position closest to the second grid electrode A selection pixel formed by selecting five ((M / 4 + J) anode segments disposed in order from each other and facing the first grid electrode (see FIG. 13 (b)).

In J = 2, two ((M / 4-J)) anode segments disposed in order from the position closest to the first grid electrode and facing the second grid electrode, and the position closest to the second grid electrode A selection pixel formed by selecting six ((M / 4 + J) anode segments disposed in order from each other and facing the first grid electrode (see Fig. 13 (c)).

In J = 1, five ((M / 4 + J)) anode segments disposed in order from the position closest to the first grid electrode and facing the second grid electrode, and the position closest to the second grid electrode A selection pixel formed by selecting three ((M / 4-J)) anode segments disposed in order from each other and facing the first grid electrode (see FIG. 13 (d)).

At J = 2, six ((M / 4 + J)) anode segments disposed in order from the position closest to the first grid electrode and facing the second grid electrode, and the position closest to the second grid electrode A selection pixel formed by selecting two ((M / 4-J)) anode segments disposed in order from each other and facing the first grid electrode (see FIG. 13 (e)).

In addition, focusing on the effect of preventing the occurrence of dark line nonuniformity, in the M matrix of another embodiment of M for achieving this effect, M is not defined as an integer of K (integer) power of 2, but is merely a positive integer Q. You may also The number of anode segments constituting the selection pixel is R (integer), which is smaller than Q, so that at least one anode segment faces each of two adjacent electrodes. By selecting one of the plurality of selection pixels having the arrangement of the other anode segments satisfying these conditions for each frame, the effect of preventing the occurrence of dark line nonuniformity can be obtained.

A technique related to another aspect for carrying out the invention is formed for each of the even-numbered positive integers Q of 8 or more, and is formed with the Q anode lead-lines formed by connecting the anode segments having the same position in the division in the lateral direction. A grid electrode extending in the longitudinal direction orthogonal to the anode segment row and having a grid lead line, the plurality of anode segment rows and the columns of the plurality of grid electrodes arranged in a matrix to form a grid; The Q-type anode matrix system formed by opposing the electrode and the? / 2 anode segments in each anode segment row relates to a fluorescent display tube, a driving circuit of the fluorescent display tube, and a driving method of the fluorescent display tube.

Among the four anode segments which are made light-emitting by turning on the adjacent first grid electrode and the second grid electrode, one to (a) arranged in order from the position closest to the first grid electrode and facing the second grid electrode; R anode segments, which are any number in the range Q / 2-1), and (Ｑ / 2-R) anode segments disposed in order from the position closest to the second grid electrode and facing the first grid electrode. A selected pixel of the plurality of selection pixels formed by selecting a total of Q / 2 anode segments is made to emit light according to the display signal.

Fig. 15 is a conceptual diagram showing an embodiment in the twelve anode matrix system.

Fig. 15A shows the state of the first frame when the grid electrode G ₁ is turned on as the first grid electrode and the grid electrode G ₂ is turned on as the second grid electrode, and Fig. 15B is the second frame. 15 (c) shows the state of the third frame, FIG. 15 (d) shows the state of the fourth frame, and FIG. 15 (e) shows the state of the fifth frame.

In the 12 anode matrix method, anode segment A, anode segment B, anode segment C, anode segment D, anode segment E, anode segment F, anode segment G, anode segment H, anode segment I, anode segment J, anode segment K 12 anode segments of the anode segment L are included in one division.

As shown in Fig. 15 (a), when G ₁ is turned on as the first grid electrode and grid electrode G ₂ is turned on as the second grid electrode, anode segment D and anode segment constituting the selection pixel in the first frame. Each of E, anode segment F, anode segment G, anode segment H, and anode segment I is simultaneously turned on in units of one segment period in accordance with a display signal from the outside, and the other anode segment is turned off.

As shown in Fig. 15B, in the case where G ₁ is turned on as the first grid electrode and grid electrode G ₂ is turned on as the second grid electrode, anode segment C and anode segment constituting the selection pixel in the second frame. Each of D, anode segment E, anode segment F, anode segment G, and anode segment H is simultaneously turned on in units of one segment period according to an external display signal, and the other anode segment is turned off.

As shown in Fig. 15 (c), when G ₁ is turned on as the first grid electrode and grid electrode G ₂ is turned on as the second grid electrode, the anode segment B and the anode segment constituting the selection pixel in the third frame. Each of C, anode segment D, anode segment E, anode segment F, and anode segment G is simultaneously turned on in units of one segment period according to an external display signal, and the other anode segment is turned off.

As shown in Fig. 15 (d), when G ₁ is turned on as the first grid electrode and grid electrode G ₂ is turned on as the second grid electrode, the anode segment E and the anode segment constituting the selection pixel in the fourth frame. Each of F, anode segment G, anode segment H, anode segment I, and anode segment J is simultaneously turned on in units of one segment period in accordance with an external display signal, and the other anode segment is turned off.

As shown in Fig. 15E, in the fifth frame, when the G ₁ is turned on as the first grid electrode and the grid electrode G ₂ is turned on as the second grid electrode, the anode segment F and the anode segment constituting the selected pixel. Each of the G, the anode segment H, the anode segment I, the anode segment J, and the anode segment K are simultaneously turned on in units of one segment period in accordance with an external display signal, and the other anode segments are turned off.

In the case where the grid electrode G ₂ is the first grid electrode and the grid electrode G ₃ (the grid electrode not shown in FIG. 15 adjacent to the grid electrode G ₂ ) is turned on as the second grid electrode, the following anode segments Configure the selection pixel.

In the first frame, an anode segment J, an anode segment K, an anode segment L, an anode segment A, an anode segment B, and an anode segment C constitute a selection pixel. In the second frame, the anode segment I, the anode segment J, the anode segment K, the anode segment L, the anode segment A, and the anode segment B constitute a selection pixel. In the third frame, the anode segment H, the anode segment I, the anode segment J, the anode segment K, the anode segment L, and the anode segment A constitute a selection pixel.

In the fourth frame, an anode segment K, an anode segment L, an anode segment A, an anode segment B, an anode segment C, and an anode segment D constitute a selection pixel. In the fifth frame, an anode segment L, an anode segment A, an anode segment B, an anode segment C, an anode segment D, and an anode segment E constitute a selection pixel.

That is, in the state of the first frame, from the position closest to the first grid electrode, among the 12 anode segments which are capable of emitting light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), A selection pixel comprising a total of six anode segments arranged in sequence and opposing the second grid electrode and three anode segments opposing the first grid electrode arranged in a position proximate to the second grid electrode side; According to the display signal from the outside, it is turned on or off at the same time by one segment period.

In the state of the second frame, among the 12 anode segments which can emit light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are arranged in order from the position closest to the first grid electrode. And a selection pixel consisting of six anode segments in total, comprising two anode segments facing the second grid electrode and four anode segments facing the first grid electrode arranged in a position proximate to the second grid electrode side. According to the display signal, the signal is turned into one segment period and turned on or off at the same time.

In the state of the third frame, among the 12 anode segments that are capable of emitting light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are arranged in order from the position closest to the first grid electrode. And a selection pixel consisting of six anode segments in total, one anode segment facing the second grid electrode and five anode segments facing the first grid electrode disposed at a position proximate to the second grid electrode side. According to the display signal, the signal is turned into one segment period and turned on or off at the same time.

In the state of the fourth frame, among the 12 anode segments that are capable of emitting light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are arranged in order from the position closest to the first grid electrode. And a selection pixel consisting of four anode segments facing the second grid electrode and six anode segments in total, the two anode segments facing the first grid electrode disposed in a position proximate to the second grid electrode side from the outside. According to the display signal, the signal is turned into one segment period and turned on or off at the same time.

In the state of the fifth frame, among the 12 anode segments that are capable of emitting light by turning on two adjacent grid electrodes (the first grid electrode and the second grid electrode), they are arranged in order from the position closest to the first grid electrode. A selection pixel consisting of five anode segments facing the second grid electrode and six anode segments in total, one anode segment facing the first grid electrode disposed in a position proximate to the second grid electrode side from the outside; According to the display signal, the signal is turned into one segment period and turned on or off at the same time.

In addition to the eight-anode matrix method and the sixteen-node anode matrix method of the present embodiment, the quadruple matrix method including the 12-node anode matrix method can be generalized as follows. An anode segment row formed by Q anode lead lines and connected to the anode segment row orthogonal to each other by an integer number of eight or more even integers, wherein the positions of the arrays in the division are horizontally connected to the anode segments in the same position. A grid electrode extending in the longitudinal direction and formed with grid lead-out lines, the plurality of anode segment rows and the columns of the plurality of grid electrodes arranged in a matrix, Ｑ / 2 in each grid electrode and each anode segment row A Q-matrices fluorescent display tube formed by opposing two anode segments, wherein the first grid is selected from among the four anode segments that can emit light by turning on adjacent first and second grid electrodes. Are arranged in order from the position closest to the electrode and are connected to the second grid electrode. R anode segments, which are any number in the range of 1 to (Q / 2-1), which are opposite, and are arranged in order starting from the position closest to the second grid electrode and opposing the first grid electrode (-/ 2- One of the plurality of selection pixels formed by selecting Q / 2 anode segments in total of the R) anode segments is made to emit light according to the display signal.

In the eight-layer anode matrix method of this embodiment, Q = 8, each grid electrode and 4 (Q / 2) anode segments are disposed to face each other, and are arranged in order from the position closest to the first grid electrode, and the second grid. R anode segments, the number (1, 2, 3) of any one of the ranges from 1 to (Q / 2-1) facing the electrode, and the first grid arranged in order from the position closest to the second grid electrode Display one selection pixel among three kinds of selection pixels formed by selecting a total of 4 (Q / 2) anode segments of (3, 2, 1) individual (Q / 2-R) anode segments facing the electrode. It emits light according to the signal.

Here, the first selection pixel is a combination of two anode segments facing the second grid electrode and two anode segments facing the first grid electrode. Further, the second selection pixel is a combination of one anode segment facing the second grid electrode and three anode segments facing the first grid electrode. The third selection pixel is a combination of three anode segments facing the second grid electrode and one anode segment facing the first grid electrode.

In the above-mentioned 12-layer anode matrix method of this embodiment, Q = 12, and each grid electrode and 6 (Q / 2) anode segments are arranged to face each other, and are arranged in order from the position closest to the first grid electrode. R anode segments having a number (1, 2, 3, 4, 5) of any one of the ranges from 1 to (Q / 2-1) facing the second grid electrode, and the position closest to the second grid electrode. 5 formed by selecting a total of 6 (Q / 2) anode segments arranged in order from the (5, 4, 3, 2, 1) individual (Q / 2-R) anode segments facing the first grid electrode One selected pixel of the kind of selected pixels emits light in accordance with the display signal.

In the 16-layer anode matrix method of this embodiment, Q = 16, each grid electrode and 8 (Q / 2) anode segments are disposed to face each other, and are sequentially arranged from the position closest to the first grid electrode, and the second grid. R anode segments having a number (1, 2, 3, 4, 5, 6, 7) of any one of the ranges from 1 to (Q / 2-1) facing the electrode, and the closest to the second grid electrode. A total of 8 (Q / 2) anode segments of (7, 6, 5, 4, 3, 2, 1) individual (Q / 2-R) anode segments disposed sequentially from the position and facing the first grid electrode are One selected pixel of the seven types of selected pixels to be selected and formed is made to emit light in accordance with the display signal.

Here, the first selection pixel is a combination of four anode segments facing the second grid electrode and four anode segments facing the first grid electrode. Further, the second selection pixel is a combination of three anode segments facing the second grid electrode and five anode segments facing the first grid electrode. The third selection pixel is a combination of two anode segments facing the second grid electrode and six anode segments facing the first grid electrode. The fourth selection pixel is a combination of one anode segment facing the second grid electrode and seven anode segments facing the first grid electrode. The fifth selection pixel is a combination of five anode segments facing the second grid electrode and three anode segments facing the first grid electrode. The sixth selection pixel is a combination of six anode segments facing the second grid electrode and two anode segments facing the first grid electrode. The seventh selection pixel is a combination of seven anode segments facing the second grid electrode and one anode segment facing the first grid electrode.

In the sixteen-anode matrix method of the present embodiment, the number of selection pixels is seven, and the number of the selection pixels described above increases the number of selection pixels than the sixteen-node anode matrix method of the five types of embodiments, thereby generating dark line unevenness. The effect of preventing can be made higher. In the 16-node anode matrix in which Q = 16, the number of Rs may be selected from one to (Q / 2-1) ranges facing one adjacent grid electrode. R (integer) anode segments arranged in order from the position closest to the adjacent first grid electrode and opposing the second grid electrode, being any one of 2 to (Q / 2-2), and the second grid If the sum of the (Ｑ / 2-R) anode segments arranged in order from the position closest to the electrode and facing the first grid electrode (Q / 2) anode segments is selected to form the selection pixel, the selection pixel described above The configuration is the same as that of the sixteen-layer anode matrix system of the embodiment in which the number of s is 5 kinds. In general, in an anode matrix system of Q, when Q = ^2K , two ^{(K-3) s} are arranged in order from the position closest to the adjacent first grid electrode and oppose the second grid electrode. R (integer) anode segments, which are any one of (Q / 2-2 ^(K-3) ), are arranged in order from the position closest to the second grid electrode and are opposed to the first grid electrode. If the total (Q / 2) anode segments of 2-R) anode segments are selected to form a selection pixel, the configuration is the same as in the above-described embodiment.

Also in this embodiment, as shown in FIG. 14, you may make the driver built fluorescent display tube CIGVFD which incorporates a drive circuit inside a fluorescent display tube.

The embodiment described above may be combined to form a new embodiment. For example, in the technique of the embodiment, there are three types of selection pixels in the eight-matrix scheme and five types of selection pixels in the sixteen-matrix scheme. Here, not only all the selected pixels emit light one frame at a time, but also an arbitrary number of selection pixels within three types of ranges are selected in the eight-matrix method, and five kinds of ranges are selected in the sixteen-matrix method. An arbitrary number of selection pixels within a range may be selected, and light may be emitted in accordance with the display signal one frame at a time. In the technique of another embodiment, there are three types of selection pixels in the eighth matrix method, five types in the twelve matrix method, and seven types of selection pixels in the sixteen matrix method. Here, not only all the selected pixels emit light one frame at a time, but also an arbitrary number of selection pixels within three types of ranges are selected in the eighth matrix method, and five kinds of ranges are selected in the twelve matrix method. Any number of selection pixels within a range may be selected, and in the sixteen-matrix scheme, any number of selection pixels within seven types of ranges may be selected, and light may be emitted one by one in accordance with the display signal. In addition, of course, this invention is not limited to embodiment mentioned above.

10 drive circuit 11 external interface
12 Ram 13 Counter
14 Frame Counter 15 Timing Generator
30 driver built-in fluorescent tube
31 cathode 32 grid electrode
33 anode segment 34 base plate
35 Filament Leads 36 Leads for Driver Chips
A, to P anode segment, DA ₁ to DG _n grid lead-in
G ₁ , G ₂ , G ₃ , G ₄ , G _n grid electrodes

Claims (10)

An anode segment row formed with Q anode lead-lines formed by connecting the anode segments in which the positions of the arrays in the division are arranged in the same direction in column direction, each of which is equal to or greater than eight even integers Q, and the anodes A grid electrode extending in a row direction orthogonal to the segment row and formed with a grid leader line,
Q-type anode matrix fluorescence formed by arranging a plurality of the anode segment rows and the columns of the plurality of grid electrodes in a matrix shape so as to oppose each of the grid electrodes and? / 2 anode segments in each anode segment row. In the display tube,
Of the several anode segments which are light-emitting by turning on the adjacent 1st grid electrode and the 2nd grid electrode,
R (integer) anode segments disposed one by one from the position closest to the first grid electrode and facing one another from the range of 1 to (Q / 2-1), and the first Selection of one of the plurality of selection pixels arranged in order from the position closest to the two grid electrodes and in which a total of Q / 2 anode segments opposing the first grid electrode are selected and formed. A fluorescent display tube comprising a driving circuit for emitting pixels in accordance with a display signal.

The method of claim 1,
And said drive circuit is arranged inside said fluorescent display tube.
The method of claim 1,
And one selection pixel emits light one frame at a time.
An anode segment row formed with Q anode lead-lines formed by connecting the anode segments in which the positions of the arrays in the division are arranged in the same direction in column direction, each of which is equal to or greater than eight even integers Q, and the anodes A grid electrode extending in a row direction orthogonal to the segment row and formed with a grid leader line,
Q-type anode matrix fluorescence formed by arranging a plurality of the anode segment rows and the columns of the plurality of grid electrodes in a matrix shape so as to oppose each of the grid electrodes and? / 2 anode segments in each anode segment row. In the drive circuit of the display tube,
Of the several anode segments which are light-emitting by turning on the adjacent 1st grid electrode and the 2nd grid electrode,
R (integer) anode segments disposed one by one from the position closest to the first grid electrode and facing one another from the range of 1 to (Q / 2-1), and the first Selection of one of the plurality of selection pixels arranged in order from the position closest to the two grid electrodes and in which a total of Q / 2 anode segments opposing the first grid electrode are selected and formed. A driving circuit of a fluorescent display tube which emits light according to a display signal.
An anode segment row formed with Q anode lead-lines formed by connecting the anode segments in which the positions of the arrays in the division are arranged in the same direction in column direction, each of which is equal to or greater than eight even integers Q, and the anodes A grid electrode extending in a row direction orthogonal to the segment row and formed with a grid leader line,
Q-type anode matrix fluorescence formed by arranging a plurality of the anode segment rows and the columns of the plurality of grid electrodes in a matrix shape so as to oppose each of the grid electrodes and? / 2 anode segments in each anode segment row. In the driving method of a fluorescent display tube which drives a display tube,
Of the several anode segments which are light-emitting by turning on the adjacent 1st grid electrode and the 2nd grid electrode,
R (integer) anode segments disposed one by one from the position closest to the first grid electrode and facing one another from the range of 1 to (Q / 2-1), and the first Selection of one of the plurality of selection pixels arranged in order from the position closest to the two grid electrodes and in which a total of Q / 2 anode segments opposing the first grid electrode are selected and formed. A method of driving a fluorescent display tube that emits pixels in accordance with a display signal.
An anode segment row formed with M anode lead-lines by dividing each of the positive integers M of eight or more positive integers represented by powers of two and having the position of the array in the division in the column direction. And a grid electrode extending in a row direction orthogonal to the anode segment row and formed with a grid leader line,
A matrix of fluorescence in M is formed by arranging a plurality of the anode segment rows and the columns of the plurality of grid electrodes in a matrix shape so as to face M / 2 anode segments in each grid electrode and each anode segment row. In the display tube,
Among the M anode segments which are light-emitting by turning on the adjacent 1st grid electrode and the 2nd grid electrode,
(M / 4) anode segments disposed sequentially from the position closest to the first grid electrode and opposing the second grid electrode, and disposed sequentially from the position nearest the second grid electrode and positioned on the first grid electrode. A selection pixel in which opposing (M / 4) anode segments are selected and formed;
(M / 4-J) anode segments disposed sequentially from the position closest to the first grid electrode and opposing the second grid electrode, and sequentially arranged from the position nearest the second grid electrode and arranged on the first grid One or a plurality of selected pixels which are selected and formed by varying the value of J from 1 to 2 ^(K-3) so as to have (M / 4 + J) anode segments facing the electrode,
(M / 4 + J) anode segments disposed sequentially from the position closest to the first grid electrode and opposing the second grid electrode, and sequentially arranged from the position nearest the second grid electrode and arranged on the first grid 1 or a plurality of selected pixels formed by changing the value of J (integer) from 1 to 2 ^(K-3) so as to have (M / 4-J) anode segments facing the electrode.
A fluorescent display tube comprising a driving circuit for causing one selected pixel to emit light in accordance with a display signal.
The method according to claim 6,
M is 8, J is 1,
In the eight-layer anode matrix fluorescent display tube formed by facing each grid electrode and four anode segments of each anode segment row,
Among the eight anode segments which are light-emitting by turning on the adjacent 1st grid electrode and the 2nd grid electrode,
Two anode segments disposed in order from the position closest to the first grid electrode and facing the second grid electrode, and two anode segments disposed in order from the position closest to the second grid electrode and opposite the first grid electrode. A selection pixel in which the anode segment is selected and formed;
One anode segment disposed in order from the position closest to the first grid electrode and facing the second grid electrode, and three anode segments disposed in order from the position closest to the second grid electrode and opposite the first grid electrode A selection pixel in which the anode segment is selected and formed;
Three anode segments disposed in order from the position closest to the first grid electrode and facing the second grid electrode, and one anode disposed in order from the position closest to the second grid electrode and opposite the first grid electrode. And a driving circuit for causing one of the selection pixels formed by selecting the anode segment to emit light according to the display signal.
The method according to claim 6 or 7,
And said drive circuit is arranged inside said fluorescent display tube.

An anode segment row formed with M anode lead-lines by dividing each of the positive integers M of eight or more positive integers represented by the K powers of 2 and having the array positions arranged in the same position in the column direction. And a grid electrode extending in a row direction orthogonal to the anode segment row and formed with a grid leader line,
A matrix of fluorescence in M is formed by arranging a plurality of the anode segment rows and the columns of the plurality of grid electrodes in a matrix shape so as to face M / 2 anode segments in each grid electrode and each anode segment row. In the drive circuit of the fluorescent display tube which drives a display tube,
Of the M anode segments which are light-emitting by turning on the adjacent 1st grid electrode and the 2nd grid electrode, they are arrange | positioned sequentially from the position closest to the said 1st grid electrode, and oppose the said 2nd grid electrode (M (4) anode segments, and a selection pixel in which (M / 4) anode segments disposed in order from the position closest to the second grid electrode and opposing the first grid electrode are selected and formed;
(M / 4-J) anode segments disposed sequentially from the position closest to the first grid electrode and opposing the second grid electrode, and sequentially arranged from the position nearest the second grid electrode and arranged on the first grid One or a plurality of selected pixels which are selected and formed by varying the value of J from 1 to 2 ^(K-3) so as to have (M / 4 + J) anode segments facing the electrode,
(M / 4 + J) anode segments disposed sequentially from the position closest to the first grid electrode and opposing the second grid electrode, and sequentially arranged from the position nearest the second grid electrode and arranged on the first grid Among one or a plurality of selected pixels formed by selecting a value of J (integer ⁾ by changing from 1 to 2 ^(K-3) so as to have (M / 4-J) anode segments facing the electrode.
A driving circuit of a fluorescent display tube which emits one selected pixel in accordance with a display signal.
An anode segment row formed with M anode lead-lines by dividing each of the positive integers M of eight or more positive integers represented by powers of two and having the position of the array in the division in the column direction. And a grid electrode extending in a row direction orthogonal to the anode segment row and formed with a grid leader line,
A matrix of fluorescence in M is formed by arranging a plurality of the anode segment rows and the columns of the plurality of grid electrodes in a matrix shape so as to face M / 2 anode segments in each grid electrode and each anode segment row. In the driving method of a fluorescent display tube which drives a display tube,
Among the M anode segments which are light-emitting by turning on the adjacent 1st grid electrode and the 2nd grid electrode,
(M / 4) anode segments disposed sequentially from the position closest to the first grid electrode and opposing the second grid electrode, and disposed sequentially from the position nearest the second grid electrode and positioned on the first grid electrode. A selection pixel in which opposing (M / 4) anode segments are selected and formed;
(M / 4-J) anode segments disposed sequentially from the position closest to the first grid electrode and opposing the second grid electrode, and sequentially arranged from the position nearest the second grid electrode and arranged on the first grid One or a plurality of selected pixels which are selected and formed by varying the value of J from 1 to 2 ^(K-3) so as to have (M / 4 + J) anode segments facing the electrode,
(M / 4 + J) anode segments disposed sequentially from the position closest to the first grid electrode and opposing the second grid electrode, and sequentially arranged from the position nearest the second grid electrode and arranged on the first grid Among one or a plurality of selected pixels formed by selecting a value of J (integer ⁾ by changing from 1 to 2 ^(K-3) so as to have (M / 4-J) anode segments facing the electrode.
A driving method of a fluorescent display tube which emits one selected pixel in accordance with a display signal.

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